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New compact sensorless AC drive from Parker gives 12% energy savings
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To date, permanent magnet motors have not been widely used in many industrial applications as they require additional speed or position sensing mechanisms and control by high end drive units, making them relatively costly and complicated to install. As a result, even though they are less efficient and considerably larger in size, induction motors have generally been the preferred choice for design and production engineers.
Now, however, by using innovative algorithm control based on motor voltage and current output, the new AC650S Drive enables standard permanent magnet motors to be used in closed loop applications, without the need for additional sensors. Engineers can therefore benefit from the energy savings that can be achieved from brushless motor such as Parker’s NX and ATEX EX Series, with savings of up to 12% for a 0.75kW system being possible; similarly, engineers have the opportunity to design more compact control systems, which can be as small as 25% the size of a conventional induction motor assembly.
Download design of brushless permanent magnet motors, PDF eBook
"PDF eBooks for design of brushless permanent magnet motors,"
Driving up the efficiency of motor based applications through improved control
The European sales market forecast for integral horsepower (750W and above) motors is dominated by AC motors. Sales of these motors represent 96% (or over 9 million) of all units sold, of which 87% consists of 3-phase AC induction motors.
The market for efficient motors in the EU has seen a significant transformation and demand, following the introduction of the CEMEP/EU agreement, where the lowest efficient motor of the three classifications have since been virtually withdrawn from the market.
New Mixed Rare Earth Permanent Magnet Material Shows Promise
Recently I came across a May 2009 presentation published by the US Department of Energy’s [DoE] Ames Lab, on a new mixed rare earth-based [MRE-Fe-B] permanent magnet [PM] alloy, for high temperature applications.
The work forms part of the DoE’s multi-year FreedomCAR project, with a number of specific goals:
* Production of magnet materials for PM motors, capable of operating at 150-200 °C [300-390 °F] and for up to 15 years;
Monitoring Motor Vibration: It Can Harm Both Energy And Efficiency - Engineer Live, For Engineers, By Engineers
Electric motors as the prime movers in all industry sectors are a major example. Generally regarded as highly reliable, due to tried and tested construction techniques, they are, nevertheless, subject to number of harmful conditions that can affect their performance and reduce operational life.
One of the most common of these conditions is vibration, resulting from either electrical or mechanical imbalance in the motor.
Motor Bearings Benefit Form Lower Friction - a Design Engineer Article at Engineer Live
The Schaeffler Group has therefore developed the Generation C range of deep groove ball bearings that not only offer 35 per cent less friction than their predecessors, but also cut noise levels by 50 per cent. This means a more efficient motor, resulting in reduced energy consumption, plus the new design improvements enable the bearings to run faster, while simultaneously increasing the operating life.
Electro Magnetic Energy (EME)
When the motor runs above a certain speed, the shaft rides on a magnetic cushion, not on bearings, eliminating the metal-on-metal wear all together.
The motor produces no heat but runs at ambient temperature.
Wheel - All-In-One Standard for Engine, Brake & Suspension
The active wheel also has an electric suspension system, which is something only seen in the military about two years ago. The electric suspension is basically the same with a classic one, except the central shock absorbers, that comprise active, step-by-step motors driving a rack-and-pinion system at each wheel, that can cancel out anything the computer tells them to. This leads to better stability, lower vibrations and possibly reduced energy use.
Air Powered Motors: Small as Watermelons, More Efficient than Diesel | Air powered | The Green Optimistic
If you watch The Green Optimistic you already know that we covered air cars in previous posts, both MDI CAT’s and the Angelo DiPietro air motor. The first time we wrote about these inventions was about 6 months ago. Now, MDI and Angelo DiPietro have contracts all over the world with auto makers to sell them the compressed air technology
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